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https://issues.apache.org/jira/browse/HADOOP-15327?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17367842#comment-17367842
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Wei-Chiu Chuang commented on HADOOP-15327:
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This is an excerpt of the error:
{noformat}
Found in:
org.apache.hadoop:hadoop-client-minicluster:jar:3.4.0-SNAPSHOT:compile
org.apache.hadoop:hadoop-client-runtime:jar:3.4.0-SNAPSHOT:compile
Duplicate classes:
org/apache/hadoop/shaded/io/netty/handler/codec/mqtt/MqttSubscriptionOption$RetainedHandlingPolicy.class
org/apache/hadoop/shaded/io/netty/buffer/ByteBufProcessor$3.class
org/apache/hadoop/shaded/io/netty/handler/codec/http2/Http2Headers$PseudoHeaderName.class
org/apache/hadoop/shaded/io/netty/handler/codec/http2/StreamBufferingEncoder$Http2GoAwayException.class
org/apache/hadoop/shaded/io/netty/channel/epoll/AbstractEpollChannel$AbstractEpollUnsafe$3.class
org/apache/hadoop/shaded/io/netty/handler/codec/spdy/SpdySession.class
org/apache/hadoop/shaded/io/netty/channel/udt/UdtServerChannelConfig.class
org/apache/hadoop/shaded/io/netty/handler/codec/http2/Http2Flags.class
{noformat}
> Upgrade MR ShuffleHandler to use Netty4
> ---------------------------------------
>
> Key: HADOOP-15327
> URL: https://issues.apache.org/jira/browse/HADOOP-15327
> Project: Hadoop Common
> Issue Type: Sub-task
> Reporter: Xiaoyu Yao
> Assignee: Szilard Nemeth
> Priority: Major
> Attachments: HADOOP-15327.001.patch, HADOOP-15327.002.patch,
> HADOOP-15327.003.patch, HADOOP-15327.004.patch,
> getMapOutputInfo_BlockingOperationException_awaitUninterruptibly.log
>
>
> This way, we can remove the dependencies on the netty3 (jboss.netty)
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